Description The includes() method returns true if a string contains a specified string. Otherwise it returns false. The includes() method is case sensitive.

Jul 10, 2025 · The includes () method of String values performs a case-sensitive search to determine whether a given string may be found within this string, returning true or false as appropriate.

Nov 24, 2009 · Usually I would expect a String.contains () method, but there doesn't seem to be one. What is a reasonable way to check for this?

Jan 16, 2026 · The includes () method is used to check whether a string contains a specific value. It returns a boolean result based on whether the text is found or not. Returns true if the string contains …

In this tutorial, you will learn how to use the JavaScript String includes () method to check if a string contains a substring.

Dec 5, 2025 · Learn how to check if a string contains a specific value in JavaScript using includes (), indexOf (), and regex. Simple examples for beginners.

Learn how to use the JavaScript String includes () method to check if a string contains a specified substring. Explore syntax, examples, and practical applications.

Sep 12, 2025 · JavaScript string includes () method checks whether one string may be found within another string, returning true or false as appropriate.

This JavaScript tutorial explains how to use the string method called includes () with syntax and examples. In JavaScript, includes () is a string method that determines whether a substring is found …

Modern JavaScript provides a simple, direct, and highly readable method for this task: String.prototype.includes(). This guide will teach you how to use the .includes() method for both case …